prāṇasya śodhayen mārgaṁ pūra-kumbhaka-recakaiḥ pratikūlena vā cittaṁ yathā sthiram acañcalam Translation The yogī should clear the passage of vital air by breathing in the following manner: first he should inhale very deeply, then hold the breath in, and finally exhale. Or, reversing the process, the yogi can first exhale, then hold the breath outside, and finally inhale. This is done so that the mind may become steady and free from external disturbances. Purport These breathing exercises are performed to control the mind and fix it on the Supreme Personality of Godhead. Sa vai manaḥ kṛṣṇa-padāravindayoḥ: the devotee Ambarīṣa Mahārāja fixed his mind on the lotus feet of Kṛṣṇa twenty-four hours a day. The process of Kṛṣṇa consciousness is to chant Hare Kṛṣṇa and to hear the sound attentively so that the mind is fixed upon the transcendental vibration of Kṛṣṇa’s name, which is nondifferent from Kṛṣṇa the personality. The real purpose of controlling the mind by the prescribed method of c...